• Basic forms
• 清める — to purify; to cleanse / base form
• 清めます — purifies; cleanses / masu form
• 清めた — purified; cleansed / ta form
• 清めて — purify and …; cleanse and … / te-form
• 清めない — do not purify / negative
• 清めれば — if (you) purify / conditional
• 清めろ・清めよ — purify! cleanse! / imperative
• Common expressions
• 身を清める — to purify oneself
• 心を清める — to cleanse one’s heart
• 場を清める — to purify a place
• More
• 清めたい — want to purify / 〜たい form
• 清められる — can purify / potential
• 清めている — is purifying / progressive

清める（きよめる） is an ichidan verb. It means to make something clean or pure, often used in cultural or religious contexts, such as Shinto rituals, as well as in a figurative sense for the mind or heart.